Home / 13,420.82-18,520.86-7,370.66

Finding the Fourth Proportional to 13,420.82, 18,520.86 and 7,370.66

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Solution

The fourth proportional to 13,420.82, 18,520.86 and 7,370.66 is: 10,171.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,420.82 : 18,520.86 = 7,370.66 : x
  2. Step 2: Convert to fraction form
    13,420.82/18,520.86 = 7,370.66/x
  3. Step 3: Cross multiply
    13,420.82x = 18,520.86 × 7,370.66
  4. Step 4: Simplify right side
    13,420.82x = 136,510,869.36
  5. Step 5: Solve for x
    x = 136,510,869.36/13,420.82
  6. Step 6: Final answer
    x = 10,171.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.